The 6 XC (“Across the Course”) is a competition-grade 6 mm cartridge, originally a wildcat necked from .250 Savage—now CIP-standardized and manufactured by Norma .
Norma brass is regarded as top-tier—accurate, durable, neck-annealed, and flash-hole punched for reliable ignition .
Full‑length size, chamfer/deburr necks, uniform primer pockets—standard prep recommended by Norma .
Monitor neck thickness—if using heavier bullets, adjust neck or bushing sizing as experienced reloaders note thicker necks in Norma brass .
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